The University of Michigan Plant Operations Utilities & Plant Engineering Energy Management Section Energy Conservation Measures Energy Conservation Measures Outline: Definition of ECM Common (and not so common) ECM’s Case Studies (Museum of Art, GG Brown) Results Questions 1 Energy Conservation Measures Definition of ECM An ECM is to improve the energy efficiency of building infrastructure, including heating/cooling/ventilation systems, utility systems, roof, and windows. This is achieved by an engineering investigation to identify potential replacements of, or upgrades to, existing systems that enhance energy efficiency in a cost-effective manner. Energy Conservation Measures Commonly Used ECM’s Direct Digital Controls Variable Speed Drives VAV Boxes Insulation Lighting Retrofits Not So Common ECM’s Window Films Green Roofs 2 Energy Conservation Measures Case Study: Alumni Memorial Hall Energy Conservation Measures Case Study: Alumni Memorial Hall Lighting Retrofit Replacement of 220 ballasts & 440 lamps Replacement of 33 incandescent fixtures with compact fluorescent Fixtures Completed June, 1999 3 Energy Conservation Measures Case Study: Alumni Memorial Hall DDC Controls for Air Handling Units Replacement of existing pneumatic controls Allows for scheduling & 24 hour monitoring Includes carbon dioxide sensors, and controls for enthalpy, humidity, temperature Completed June, 2000 Energy Conservation Measures Case Study: Alumni Memorial Hall Variable Frequency Motor Drives for Cooling Tower fans Reduces maintenance requirements Avoids hard starts and stops Controls fan speed based on demand Completed May, 2001 4 Energy Conservation Measures Case Study: Alumni Memorial Hall Electricity Use Analysis 700 650 600 MWh550 500 450 400 Energy Star annual savings from FY98 to FY04 = xx MWh ECO projectedElectricity annual savings Use from Analysis FY05 to FY151995-2015 = xx MWh 1995 1996 2001 VFD Motor Drives 1997 2000 1999 DDC f or A HUs 1998 Lighting Retrofit 1999 2000 2001 2002 2003 2004 Energy Conservation Measures2005 2006 Case Study: Alumni Memorial Hall 2007 Case Study: Alumni Memorial Hall 2008 Thermal Energy Use Analysis 2009 2010 2011 2012 2013 Actual Use Projection 15,000 2014 14,000 13,000 2015 12,000 11,000 10,000 mmBtu 9,000 8,000 7,000 6,000 5,000 Thermal Energy Use Analysis 1995-2015 Energy Star annual savings from FY98 to FY04 = xx mm Btu ECO projected annual savings from FY05 to FY15 = xx m mBtu 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 Actual 2014 Projection 2015 5 Energy Conservation Measures Case Study: Alumni Memorial Hall Quantity & Consumption Data: Electricity Electricity Chart Annual Utility Report Data E-Star, ECO Baselines* ECM Projected Amount ECM Savings Year Qty (kWh) Cost ($) kWh/Sqft Cost/Sqft Qty (kWh) Cost ($) Qty (kWh) Cost ($) Qty (kWh) Saved ($) 1995 652,800 $52,224 15.19 $1.215 635,200 $50,816 635,200 $50,816 1996 650,800 $52,064 15.14 $1.211 635,200 $50,816 635,200 $50,816 1997 586,000 $46,880 13.63 $1.091 635,200 $50,816 635,200 $50,816 1998 651,200 $52,096 15.15 $1.212 635,200 $50,816 635,200 $50,816 1999 609,200 $49,954 14.17 $1.162 635,200 $50,816 591,200 $47,316 26,000 $862 2000 587,600 $48,183 13.67 $1.121 635,200 $50,816 579,005 $46,316 47,600 $2,633 2001 597,045 $45,375 13.89 $1.056 635,200 $50,816 548,883 $43,846 38,155 $5,441 2002 559,155 $46,410 13.01 $1.080 635,200 $50,816 548,883 $43,846 76,045 $4,406 2003 547,000 $44,854 12.73 $1.044 635,200 $50,816 548,883 $43,846 88,200 $5,962 2004 575,000 $47,725 13.38 $1.110 635,200 $50,816 548,883 $43,846 60,200 $3,091 E-Star ECM Electricity Savings 86,317 $6,970 56,033 $22,394 Energy Conservation Measures Case Study: GG Brown 6 Energy Conservation Measures Case Study: GG Brown Lighting Retrofit Replacement of approximately 3000 fluorescent fixtures with higher energy efficient fixtures Replacement of incandescent and mercury vapor fixtures Completed January, 2000 Energy Conservation Measures Case Study: GG Brown DDC Operated VAV Boxes in Lecture Hall Installation of DDC controls to VAV boxes Allows for central control of HVAC system to reduce ventilation during unoccupied periods Completed September, 1999 7 Energy Conservation Measures Case Study: GG Brown Electricity Use Analysis 7,000 6,500 6,000 MWh5,500 5,000 4,500 4,000 Energy Star annual savings from FY00 to FY04 = 727 MWh ECO projectedElectricity annual savings Use from Analysis FY05 to FY151995-2015 = 39 MWh 2000 1995 Lighting Retrofit 1996 1997 1998 2001 DDC VAV Boxes 1999 2000 2001 2003 A ir Compressor 2002 Re p 2003 lacemen 2004 t Energy Conservation Measures2005 2006 Case Study: GG Brown 2007 2008 Electricity Cost Analysis 2009 2010 2011 2012 Actual Use 20 13 Projection $560,000 20 $540,000 14 $520,000 2015 $500,000 $480,000 $460,000 $440,000 $420,000 $400,000 EnergyElectricity Star total savings Cost from Analysis FY00 to FY04 1995-2015 = $254,000 ECO projected total savings FY05 to FY15 = $32,000 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Actual Use 2013 Projection 2014 2015 8 Energy Conservation Measures Case Study: GG Brown Quantity & Consumption Data: Electricity Electricity Chart Annual Utility Report Data E-Star, ECO Baselines* ECM Projected Amount ECM Savings Year Qty (kWh) Cost ($) kWh/Sqft Cost/Sqft Qty (kWh) Cost ($) Qty (kWh) Cost ($) Qty (kWh) Saved ($) 1995 6,817,323 $545,386 31.05 $2.484 6,593,390 $527,471 6,593,390 $527,471 1996 6,771,642 $541,731 30.85 $2.468 6,593,390 $527,471 6,593,390 $527,471 1997 6,452,856 $516,228 29.39 $2.352 6,593,390 $527,471 6,593,390 $527,471 1998 6,331,740 $506,539 28.84 $2.307 6,593,390 $527,471 6,593,390 $527,471 1999 6,560,086 $537,927 29.86 $2.448 6,593,390 $527,471 6,593,390 $527,471 2000 6,412,532 $525,828 29.19 $2.393 6,593,390 $527,471 6,093,390 $487,471 180,858 $1,644 2001 5,897,196 $448,187 26.84 $2.040 6,593,390 $527,471 6,077,990 $486,239 696,194 $79,284 2002 5,842,112 $484,895 26.59 $2.207 6,593,390 $527,471 6,077,990 $486,239 751,278 $42,576 2003 5,632,432 $463,581 25.63 $2.110 6,593,390 $527,471 6,038,453 $480,404 960,958 $63,890 2004 5,548,019 $460,486 25.25 $2.096 6,593,390 $527,471 6,038,453 $480,404 1,045,371 $66,986 E-Star ECM Electricity Savings 554,937 $47,067 726,932 $254,379 Energy Conservation Measures Energy Savings under Energy Star -10.2% Thermal consumption -12.7% Electricity consumption Annual energy savings of $5.4 million Stephen Kunselman Energy Management Liaison Ph: 734-936-2605; E-mail: [email protected] 9.